Tool-retaining device



Dec. 16, 1930. M. J. SCHLQITTERS. JR., ETAL 1,784,911

yTOOL RETAINING DEVICE Patented Dec. 1.6, 1930 UNITED' STATE-S PATENT OFFICE MICHAEL J. SGHLITTERS, JR., AND STANLEY IMEBMAN, F DETROIT, 'MICHIGAN Toonmrrmme DEvIcE Application led Iay 6,

The principal object of this invention is a simple device constructed for the purpose of retaining a tool in its socket against forces acting to withdraw or extract the tool therefrom. The device is in the nature of adetent mounted in the socket member and entering a cavity formed in the tool shank, and the arrangement is such that any tendency to withdraw the shank binds the detent in a ixed position within the socket member and retains the detent in the cavity of the shank.

The inventiorralso provides a simple means for releasing the detent from its locked position. The detent is carried by a head slidably mounted in'thesocket member, and an operating stem projects from the head through the socket member to an exposed part thereof where it is accessible by the operator. Pressure on the stem inwardly of 2.0 the socket member moves the head and thus withdraws the detent from its locking position, whereby changing or replacement of tools is enabled. l

The invention is fully disclosed in the following description and in the drawings, in

which- Figure 1 is'a vertical section through the retainer for the punch;

. Figure` 2 is a similar section of the retainer `or the die;

FigureB is a section on the line 3-3 ot'J Figure' 2 ;v and Figure 4 is a perspective view of the locking device.

Reference to these views will now be made by use of like characters which are employed to designate corresponding parts throughout.

The invention is illustrated in connect-ion with a retainer for a punch and die, although the same or similar retaining means may be used in connection with any form of tool to be held in a socket. To the lower surface of a punch plate 1 is appliedv a socket member 2 having an upper flange 3 surroundedby a retaining member 4 having a notch 5 receiving the flange 3. The member4 is secured to the plate 1 by-bolts 6, wherebynthe socket member 2 is also retained by vits fiange 3 seated in the groove 5. The socket member 2 has a re'ceivingaperture or recess 7 into 1927. Serial No.' 189,444.

which 'is inserted the shank 8 of the tool which in this case is a punch. The portion' of the shank received in the aperture has a peripheral depression, preferably a groove 9, the purpose of which will presently ap- 66 pear.

Adjacent the plate 1, the member 3 is formed with a chamber 10 close to the aperture 7 but separated therefrom. In this chamber is slidably mounted a head or disk 11 from which a stem 12 extends through the member 3 to the exposed surface thereof. A spring 13 is mounted in the chamber'lO and bears upon the head and a disk 14 mounted in the top of the chamber. An inclined slot 15 is cut from the aperture 7 to the chamber 10 and accommodates a detent 16 pivoted to the head 11 as at 17. The' lengthof the detent is such that its free end enters the cavity 9 when the punch is pushed 'l0 to its uppermost limit. In this position the detent prevents the punch from dropping out of the receiving aperture, since the weight of the tool presses.the free end of the detent against the base of the slot 15, in which posi- 7l!` tion the free end still projects into the cavity 9. When it is desired to release the tool, the stem 12 is pushed inwardly, whereupon the head and detent are raised and the latter member is withdrawn from the groove 9.

Figure 2 shows the same construction for retaining a die block 20 mounted on a base v21. In this case the socket member 22 receiving the block in its cavity 23 has a flange 24 adjacent the base and received in ay groove 25 cut in the surrounding member 26 which is secured to the base by bolts 27. The outer surface of the die block 2O has a crcumferential groove 28 corresponding to the depreS- 90 sion 9 already described. The chamber 29 for receiving the head 30 is drilled from the bottom of the member 22 and communicates with the receiving aperture 23 through an inclined slot 31. The detent 32 carried by 95 the head passesA through the slot and into the groove 28.3 The head 30 has a stem 33 projecting through the member'22 and beyond the exposed surface thereof. A spring 34 mounted in the chamber 29 bears v agalnst 101 g y weeen the head and also against a. disk 35 fitted in the bottom of the cavity. 1 Any tendency ofthe d1e block 20 to be lifted when the punch is Withdrawn, is re- 5 sisted by the engagement between the detent and the upper Wall of the slot 3l While the detent is still in the groove 28. In order to release the block, the stem is depressed as in the previous embodiment, whereupon the detent is withdrawn from the groove 28.

Although a specific embodiment of the invention has been illustrated and described, it will be apparent that various alterations in the details of construction may be made L without departing from the scope of the invention as indicated by the appended claims,

What We claim is 1. A retainer for tools and the like comprisirg a socket member having a receiving n o aperture, a head slidably mounted in said member, a detent carried by said head and extending into said aperture, and a stem fixed to said head and passing through said member at the side ha g the receiving end of said aperture. y

2. A retainer for tools and the like comprising a socket member having a receiving aperture, a head'slidably mounted in said member, yieldingrpressure means acting on said head, a 'detent carried by said head and extending into said aperture, and a stem fixed to said head and passing through said member at the side having the receiving end of said aperture. In testimony whereof We`aix our signa- MCHAEL J'. SCETTERS, JR.

i STANLEY 4.o 'i l' 

